I like the concept and I hope this holds up to my expectations over time. I have had an RO system in the past which required filter changes about every three months. Back then, it was pretty expensive. This unit claims to go at least a year, depending on your water supply, I guess that's sort of a cop out on their end, but I don't think any of us can get away from that particular issue. There is some legitimacy to that claim so I plan to come back in a year or so to update this review if I am unpleased. I do not care for false advertisement and I'm not saying that these folks have done that. I am just the sort of person that will actually take the time a year from now to follow up if necessary.Now, it is an easy device to install if you already have a hole for the faucet. It will require some mounting work, but it's pretty negligible considering what it is. It's not very heavy, it's compact for what it does and access to the filter cartridges is pretty easy:-)I expect to be rejuvenated within about six hours of initially consuming the water from this. Just kidding :-)I do expect my water to taste better for many months to come before having to change the aforementioned filters. :-)The instructions for installation are pretty easy to understand so I recommend picking one of these babies up! :-) LOLI am happy with my order and I hope this was helpful. ✔️ Thanks!